DODGE® Special Duty Bearings AWS
Instruction Manual
DODGE® Special Duty Bearings 3-11/16” to 6” Bore These instructions must be read thoroughly before installation or operation. 8. If possible, line up one lockscrew hole in adapter nut with WARNING: To ensure that drive is not unexpectedly started, a slot in end of adapter. If adapter nut can no longer be turn off and lock out or tag power source before proceeding. Failure to observe these precautions could result in bodily tightened, do not back off to line up with slot in adapter. injury. 9. Tighten (turn clockwise) adapter nut at open end of housing until it is snug against end of bearing cone. Tighten lockscrew in this nut onto shaft or onto adapter. INSTALLATION INSTRUCTIONS 10. Check hold-down bolts in outer housing to see they are 1. Shaft should be within commercial tolerances, straight, loose and free. (If too tight, an excessive thrust load could smooth and clean. Apply a coating of light oil or other rust be imposed on bearing.) If bolts are very tight, it may be inhibitor to the shaft in the bearing area. advisable to loosen adapter to move slightly on shaft. 2. Loosen lockscrews in adapter nuts to prevent damage to 11. Expansion Bearing (Figure 5): Loosen the cap bolts in outer adapter. (If necessary to expand adapter, loosen adapter nut housing so unit is free to align. Inner unit should be located at closed end of housing approximately two turns and tap on with unit housing in center of outer housing so unit can move end of this nut.) Apply silicone sealant to the split in the freely in either direction. Do not remove shims between cap adapter sleeve. This provides protection against and base of outer housing. Tighten hold-down bolts. See contaminants. Table 1 for tightening torques. 3. Slide bearing to desired position on the shaft. Non-expansion Bearing (Figure 6): Loosen cap bolts in 4. Do not bolt outer housing to support until bearing is outer housing so unit is free to align in outer housing. Tighten tightened on shaft. hold-down bolts. Retighten cap bolts on both expansion and 5. Block up shaft to remove weight from bearing. This is non-expansion bearing. See Table 1 for tightening torques. extremely important where the bearing and shaft are large; 12. After a short run make sure adapter is tight: loosen lock also, where heavy equipment is mounted on shaft. screws; loosen hold-down bolts; perform steps 5 to 11 6. Loosen (turn counter-clockwise 2 or 3 turns) adapter nut at inclusive. open end of housing (adjustment nut end). 7. Tighten (turn clockwise) adapter nut at closed end of housing (end with instruction plate on inner housing). Check other nut REMOVAL INSTRUCTIONS periodically to see that it is loose as in Step 6. Make sure this 1. Loosen lockscrew in both adapter nuts and loosen hold-down nut does not touch end of bearing cone during tightening bolts. Block up shaft to remove weight from bearing. operation. 2. Loosen (turn counterclockwise) adapter nut at closed end of When considerable effort is required to turn adapter nut, housing approximately two turns. use sledge and brass bar as shown in illustrations. Keep 3. Tighten (turn clockwise) nut at open end of housing. Use tightening nut with barring rod or spanner wrench while sledge and brass bar as in Figure 4 to break the cones loose hitting on brass bar. on the adapter, thus allowing the adapter to loosen on shaft. The adapter nut is nearly tight when a solid sound or ring, such as made by hitting directly on the end of a solid shaft, develops in the adapter nut. If possible, tighten more by hitting on the barring rod or spanner wrench and the brass UNIT REPLACEMENT INSTRUCTIONS bar simultaneously. 1. Remove bearing from shaft per removal instructions. (Refer to Figures 1 through 4 for installation methods.) 2. Match mark cap and base of each outer housing before Notice: removing cap. When installing the bearing, it is very important that the split 3. Fit each unit to its outer housing before putting on shaft. tapered adapter (bearing sleeve) be drawn down on the 4. Add or remove shims between cap and base as required to shaft as tight as possible. Use one of the following illustrated obtain “snug” fit of unit in outer housing with cap bolts drawn methods to overcome friction between the tapered adapter down securely. See Table 1 for tightening torques. and the taper-bored cone and between the threads of the 5. Check fit by prying against lubrication stud in unit through the adapter and the adapter nut. The sudden jar developed by lubrication hole in housing cap with a screw driver or small the sledge and brass bar (while the tightening force is being pinch bar depending upon the size of the pillow blocks. applied to the adapter nut) helps to overcome the friction, 6. The “snug” fit becomes a matter of judgment. A “loose or allowing the nut to be tightened to a greater degree than sloppy” fit may allow a unit to move in its outer housing thus otherwise possible. wearing the mating surfaces. Too “tight” a fit will not allow WARNING: Because of the possible danger to person(s) or property from the unit to move and compensate for misalignment and for accidents which may result from the improper use of products, it is shaft deflection caused by belt pull and dead weight. important that correct procedures be followed: Products must be used 7. When reassembling pillow blocks, make sure match marks in accordance with the engineering information specified in the catalog. (step 2) on cap and bases match. Proper installation, maintenance and operation procedures must be 8. Install bearing on shaft per instructions. observed. The instructions in the instruction manuals must be followed. Inspections should be made as necessary to assure safe operation under prevailing conditions. Proper guards and other suitable safety devices or procedures as may be desirable or as may be specified in safety codes should be provided, and are neither provided by Baldor Electric Company nor are the responsibility of Baldor Electric Company. This unit and its associated equipment must be installed, adjusted and maintained by qualified personnel who are familiar with the construction and operation of all equipment in the system and the potential hazards involved. When risk to persons or property may be involved, a fail safe device must be an integral part of the driven equipment beyond the speed reducer output shaft. 1
Table 1 - Recommended Tightening Torques Cap Bolts
Pillow Block Size 3-11/16 – 4 NE & Exp. 4-7/16 – 4-1/2 NE 4-7/16 – 4-1/2 Exp. 4-15/16 – 5 NE 4-15/16 – 5 Exp. 5-7/16 – 6 NE & Exp.
Figure 1 - Preferred Method -
Hitting directly on face of adapter nut with brass bar parallel to shaft, while applying torque with barring rod to tighten nut.
Flange Size 3-11/16 – 4-1/2 4-15/16 – 5 5-7/16 – 6
Qty.
Size
2 4 2 4 2 2
1-1/8–7 7/8–9 1-1/8–7 1–8 1-1/4–7 1–8
Torque (Ft.-Lbs.) 350 170 350 250 500 250
Cap Bolts Qty.
Size
2 4 2
1–8 1–8 1-1/4–7
Torque (Ft.-Lbs.) 250 250 500
Figure 2 -
Hitting on nut at an angle where unable to hit at right angle to face. This method is not as effective as the method shown in Figure 1.
Figure 3 -
Hitting on O.D. of nut with brass bar held at right angle to shaft. This method is not as effective as the methods shown in Figures 1 or 2.
Figure 5 - Expansion Type
Figure 4 -
This is an alternate method to those shown in Figures 1, 2, and 3 in that a spanner wrench is used in place of the barring rod.
For 3-11/16” to 5” shaft sizes not less than 1-1/4” diameter: for 5-7/16” to 6” shaft sizes not less than 1-1/2” diameter. A 12” length of drill rod which is 1/64” less in diameter than the barring pockets is recommended for use as barring rod. Pipe should be used as shown for additional leverage. Pin in spanner wrench should be 1/64” less in diameter than the barring pockets.
Figure 6 - Non-Expansion Type 2
Hold-Down Bolts 4 4 4 4 4 4
LUBRICATION INSTRUCTIONS
Kind of Grease—Many ordinary cup greases will disintegrate at speeds far below those at which DODGE bearings will operate successfully if proper grease is used. DODGE bearings have been lubricated at the factory with an NLGI #2 lithium complex base grease. Relubricate with lithium or lithium complex base grease, or a grease which is compatible with the original lubricant and suitable for roller bearing service. In unusual or doubtful cases the recommendation of a reputable grease manufacturer should be secured.
Storage or Special Shutdown—If exposed to wet or dusty conditions or to corrosive vapors, extra protection is necessary: Add grease until it shows at the seals; rotate the bearing to distribute grease; cover the bearing. After storage or idle period, add a little fresh grease before running. High Speed Operation—In the higher speed ranges too much grease will cause overheating. The amount of grease that the bearing will take for a particular high speed application can only be determined by experience — see “Operating Temperature.” If excess grease in the bearing causes overheating, it will be necessary to remove grease fitting (also drain plug when furnished) to permit excess grease to escape. The bearing has been greased at the factory and is ready to run. When establishing a relubrication schedule note that a small amount of grease at frequent intervals is preferable to a large amount at infrequent intervals.
Special Operating Conditions—Refer acid, chemical, extreme or other special operating conditions to Baldor Electric Company, Dodge Bearing Engineering, Greenville, South Carolina at 864-284-5700.
Operation in Presence of Dust, Water or Corrosive Vapors—Under these conditions the bearing should contain as much grease as speed will permit, since a full bearing with consequent slight leakage is the best protection against entrance of foreign material. In the higher speed ranges too much grease will cause overheating— see “High Speed Operation” above. In the lower speed ranges it is advisable to add extra grease to a new bearing before putting into operation. Bearings should be greased as often as necessary (daily if required) to maintain a slight leakage at the seals. Normal Operation—This bearing has been greased at the factory and is ready to run. Table 2 is a general guide for relubrication. However, certain conditions may require a change of lubricating periods as dictated by experience. See “High Speed Operation” and “Operation in Presence of Dust, Water or Corrosive Vapors” above.
Table 2 - Lubrication Guide Suggested Lubrication in Weeks Hours Run 1 to 250 251 to 500 501 to 750 751 to 1000 1001 to 1250 RPM RPM RPM RPM RPM per Day 8
12
12
10
7
5
16
12
7
5
4
2
24
10
5
3
2
1
Operating Temperature—Abnormal bearing temperature may indicate faulty lubrication. Normal temperature may range from “cool to warm to the touch” up to a point “too hot to touch for more than a few seconds,” depending on bearing size and speed, and surrounding conditions. Unusually high temperature accompanied by excessive leakage of grease indicates too much grease. High temperature with no grease showing at the seals, particularly if the bearing seems noisy, usually indicates too little grease. Normal temperature and a slight showing of grease at the seals indicate proper lubrication.
3
World Headquarters P.O. Box 2400, Fort Smith, AR 72902-2400 U.S.A., Ph: (1) 479.646.4711, Fax (1) 479.648.5792, International Fax (1) 479.648.5895 Dodge Product Support 6040 Ponders Court, Greenville, SC 29615-4617 U.S.A., Ph: (1) 864.297.4800, Fax: (1) 864.281.2433 www.baldor.com © Baldor Electric Company MN3028 (Replaces 499897)
*3028-0410*
All Rights Reserved. Printed in USA. 4/10 TCP 20000
DODGE® Special Duty Bearings 3-11/16” to 6” Bore These instructions must be read thoroughly before installation or operation. 8. If possible, line up one lockscrew hole in adapter nut with WARNING: To ensure that drive is not unexpectedly started, a slot in end of adapter. If adapter nut can no longer be turn off and lock out or tag power source before proceeding. Failure to observe these precautions could result in bodily tightened, do not back off to line up with slot in adapter. injury. 9. Tighten (turn clockwise) adapter nut at open end of housing until it is snug against end of bearing cone. Tighten lockscrew in this nut onto shaft or onto adapter. INSTALLATION INSTRUCTIONS 10. Check hold-down bolts in outer housing to see they are 1. Shaft should be within commercial tolerances, straight, loose and free. (If too tight, an excessive thrust load could smooth and clean. Apply a coating of light oil or other rust be imposed on bearing.) If bolts are very tight, it may be inhibitor to the shaft in the bearing area. advisable to loosen adapter to move slightly on shaft. 2. Loosen lockscrews in adapter nuts to prevent damage to 11. Expansion Bearing (Figure 5): Loosen the cap bolts in outer adapter. (If necessary to expand adapter, loosen adapter nut housing so unit is free to align. Inner unit should be located at closed end of housing approximately two turns and tap on with unit housing in center of outer housing so unit can move end of this nut.) Apply silicone sealant to the split in the freely in either direction. Do not remove shims between cap adapter sleeve. This provides protection against and base of outer housing. Tighten hold-down bolts. See contaminants. Table 1 for tightening torques. 3. Slide bearing to desired position on the shaft. Non-expansion Bearing (Figure 6): Loosen cap bolts in 4. Do not bolt outer housing to support until bearing is outer housing so unit is free to align in outer housing. Tighten tightened on shaft. hold-down bolts. Retighten cap bolts on both expansion and 5. Block up shaft to remove weight from bearing. This is non-expansion bearing. See Table 1 for tightening torques. extremely important where the bearing and shaft are large; 12. After a short run make sure adapter is tight: loosen lock also, where heavy equipment is mounted on shaft. screws; loosen hold-down bolts; perform steps 5 to 11 6. Loosen (turn counter-clockwise 2 or 3 turns) adapter nut at inclusive. open end of housing (adjustment nut end). 7. Tighten (turn clockwise) adapter nut at closed end of housing (end with instruction plate on inner housing). Check other nut REMOVAL INSTRUCTIONS periodically to see that it is loose as in Step 6. Make sure this 1. Loosen lockscrew in both adapter nuts and loosen hold-down nut does not touch end of bearing cone during tightening bolts. Block up shaft to remove weight from bearing. operation. 2. Loosen (turn counterclockwise) adapter nut at closed end of When considerable effort is required to turn adapter nut, housing approximately two turns. use sledge and brass bar as shown in illustrations. Keep 3. Tighten (turn clockwise) nut at open end of housing. Use tightening nut with barring rod or spanner wrench while sledge and brass bar as in Figure 4 to break the cones loose hitting on brass bar. on the adapter, thus allowing the adapter to loosen on shaft. The adapter nut is nearly tight when a solid sound or ring, such as made by hitting directly on the end of a solid shaft, develops in the adapter nut. If possible, tighten more by hitting on the barring rod or spanner wrench and the brass UNIT REPLACEMENT INSTRUCTIONS bar simultaneously. 1. Remove bearing from shaft per removal instructions. (Refer to Figures 1 through 4 for installation methods.) 2. Match mark cap and base of each outer housing before Notice: removing cap. When installing the bearing, it is very important that the split 3. Fit each unit to its outer housing before putting on shaft. tapered adapter (bearing sleeve) be drawn down on the 4. Add or remove shims between cap and base as required to shaft as tight as possible. Use one of the following illustrated obtain “snug” fit of unit in outer housing with cap bolts drawn methods to overcome friction between the tapered adapter down securely. See Table 1 for tightening torques. and the taper-bored cone and between the threads of the 5. Check fit by prying against lubrication stud in unit through the adapter and the adapter nut. The sudden jar developed by lubrication hole in housing cap with a screw driver or small the sledge and brass bar (while the tightening force is being pinch bar depending upon the size of the pillow blocks. applied to the adapter nut) helps to overcome the friction, 6. The “snug” fit becomes a matter of judgment. A “loose or allowing the nut to be tightened to a greater degree than sloppy” fit may allow a unit to move in its outer housing thus otherwise possible. wearing the mating surfaces. Too “tight” a fit will not allow WARNING: Because of the possible danger to person(s) or property from the unit to move and compensate for misalignment and for accidents which may result from the improper use of products, it is shaft deflection caused by belt pull and dead weight. important that correct procedures be followed: Products must be used 7. When reassembling pillow blocks, make sure match marks in accordance with the engineering information specified in the catalog. (step 2) on cap and bases match. Proper installation, maintenance and operation procedures must be 8. Install bearing on shaft per instructions. observed. The instructions in the instruction manuals must be followed. Inspections should be made as necessary to assure safe operation under prevailing conditions. Proper guards and other suitable safety devices or procedures as may be desirable or as may be specified in safety codes should be provided, and are neither provided by Baldor Electric Company nor are the responsibility of Baldor Electric Company. This unit and its associated equipment must be installed, adjusted and maintained by qualified personnel who are familiar with the construction and operation of all equipment in the system and the potential hazards involved. When risk to persons or property may be involved, a fail safe device must be an integral part of the driven equipment beyond the speed reducer output shaft. 1
Table 1 - Recommended Tightening Torques Cap Bolts
Pillow Block Size 3-11/16 – 4 NE & Exp. 4-7/16 – 4-1/2 NE 4-7/16 – 4-1/2 Exp. 4-15/16 – 5 NE 4-15/16 – 5 Exp. 5-7/16 – 6 NE & Exp.
Figure 1 - Preferred Method -
Hitting directly on face of adapter nut with brass bar parallel to shaft, while applying torque with barring rod to tighten nut.
Flange Size 3-11/16 – 4-1/2 4-15/16 – 5 5-7/16 – 6
Qty.
Size
2 4 2 4 2 2
1-1/8–7 7/8–9 1-1/8–7 1–8 1-1/4–7 1–8
Torque (Ft.-Lbs.) 350 170 350 250 500 250
Cap Bolts Qty.
Size
2 4 2
1–8 1–8 1-1/4–7
Torque (Ft.-Lbs.) 250 250 500
Figure 2 -
Hitting on nut at an angle where unable to hit at right angle to face. This method is not as effective as the method shown in Figure 1.
Figure 3 -
Hitting on O.D. of nut with brass bar held at right angle to shaft. This method is not as effective as the methods shown in Figures 1 or 2.
Figure 5 - Expansion Type
Figure 4 -
This is an alternate method to those shown in Figures 1, 2, and 3 in that a spanner wrench is used in place of the barring rod.
For 3-11/16” to 5” shaft sizes not less than 1-1/4” diameter: for 5-7/16” to 6” shaft sizes not less than 1-1/2” diameter. A 12” length of drill rod which is 1/64” less in diameter than the barring pockets is recommended for use as barring rod. Pipe should be used as shown for additional leverage. Pin in spanner wrench should be 1/64” less in diameter than the barring pockets.
Figure 6 - Non-Expansion Type 2
Hold-Down Bolts 4 4 4 4 4 4
LUBRICATION INSTRUCTIONS
Kind of Grease—Many ordinary cup greases will disintegrate at speeds far below those at which DODGE bearings will operate successfully if proper grease is used. DODGE bearings have been lubricated at the factory with an NLGI #2 lithium complex base grease. Relubricate with lithium or lithium complex base grease, or a grease which is compatible with the original lubricant and suitable for roller bearing service. In unusual or doubtful cases the recommendation of a reputable grease manufacturer should be secured.
Storage or Special Shutdown—If exposed to wet or dusty conditions or to corrosive vapors, extra protection is necessary: Add grease until it shows at the seals; rotate the bearing to distribute grease; cover the bearing. After storage or idle period, add a little fresh grease before running. High Speed Operation—In the higher speed ranges too much grease will cause overheating. The amount of grease that the bearing will take for a particular high speed application can only be determined by experience — see “Operating Temperature.” If excess grease in the bearing causes overheating, it will be necessary to remove grease fitting (also drain plug when furnished) to permit excess grease to escape. The bearing has been greased at the factory and is ready to run. When establishing a relubrication schedule note that a small amount of grease at frequent intervals is preferable to a large amount at infrequent intervals.
Special Operating Conditions—Refer acid, chemical, extreme or other special operating conditions to Baldor Electric Company, Dodge Bearing Engineering, Greenville, South Carolina at 864-284-5700.
Operation in Presence of Dust, Water or Corrosive Vapors—Under these conditions the bearing should contain as much grease as speed will permit, since a full bearing with consequent slight leakage is the best protection against entrance of foreign material. In the higher speed ranges too much grease will cause overheating— see “High Speed Operation” above. In the lower speed ranges it is advisable to add extra grease to a new bearing before putting into operation. Bearings should be greased as often as necessary (daily if required) to maintain a slight leakage at the seals. Normal Operation—This bearing has been greased at the factory and is ready to run. Table 2 is a general guide for relubrication. However, certain conditions may require a change of lubricating periods as dictated by experience. See “High Speed Operation” and “Operation in Presence of Dust, Water or Corrosive Vapors” above.
Table 2 - Lubrication Guide Suggested Lubrication in Weeks Hours Run 1 to 250 251 to 500 501 to 750 751 to 1000 1001 to 1250 RPM RPM RPM RPM RPM per Day 8
12
12
10
7
5
16
12
7
5
4
2
24
10
5
3
2
1
Operating Temperature—Abnormal bearing temperature may indicate faulty lubrication. Normal temperature may range from “cool to warm to the touch” up to a point “too hot to touch for more than a few seconds,” depending on bearing size and speed, and surrounding conditions. Unusually high temperature accompanied by excessive leakage of grease indicates too much grease. High temperature with no grease showing at the seals, particularly if the bearing seems noisy, usually indicates too little grease. Normal temperature and a slight showing of grease at the seals indicate proper lubrication.
3
World Headquarters P.O. Box 2400, Fort Smith, AR 72902-2400 U.S.A., Ph: (1) 479.646.4711, Fax (1) 479.648.5792, International Fax (1) 479.648.5895 Dodge Product Support 6040 Ponders Court, Greenville, SC 29615-4617 U.S.A., Ph: (1) 864.297.4800, Fax: (1) 864.281.2433 www.baldor.com © Baldor Electric Company MN3028 (Replaces 499897)
*3028-0410*
All Rights Reserved. Printed in USA. 4/10 TCP 20000
